Electric switch



May 3, 1932.

V. G. APPLE ELECTRIC SWITCH Filed Jan. 27, 1930 I JNVENTOR. Mncent,flpp/e ATTORNEYS Patented- May 3, 1932 UNITED STATES PATENT OFFICE vINcEN'r e. 'AI'PLE, or DAYTON, 0310, ASSIGNOB 'ro BENDIX BRAKE comPANY,or r sourn BEND, INDIANA, A CORPORATION or ILLINoIs ELECTRIC swI'rcIIApplication filed January 27, 1930. Serial No. 4232641.

My invention relates to electric switches and has particular referenceto a switch which may be utilized to close a plurality of ber of theswitch is continuously operated.

In its final stage the circuit will be without any resistance thelastswitch having functioned to shunt out the resistance from thecircuit.

Another object of my inventionis'to provide a switch such as abovedescribed which is constructed of relatively few partsand very simplyassembled.

Still other objects and meritorious features of my invention will beapparent from the following description taken in conjunction with thedrawings wherein like numerals refer to like parts throu hout theseveral figures and wherein 2 "Fig. 1 is a cross sectionthrough thevertical axis of the switch element along the line 11 of Fig.2, 7 p

Fig. 2 is a cross section through the vertical axis between the switchelement along the line 22 of Fig. 1, r

\ Fig. 3 is a plan view, partly in section, taken along the line 3'3 ofFig. 1, and

Fig. 4 is a circuit diagram illustrating one manner of applying theswitch toa circuit including external resistance, battery, and

, in place by means of the nuts 14.

electric motor.

, As illustrated in the drawings my switch unit is comprised of'ahousing of suitable insulation material. arethreaded into the'housingand clamped The nousthe-screws 18. 1 The plate is securely faswithin thescope of the appended claims. The terminal screws 12 tened to the covermember rivets, welding or an other desired means. As illustrated in ig.2 the screws 18 are threaded through the lateral flanges 22 of the covermember20 and assist in securing this cover to the assembly. p

Extending through the plate 16 are the insulated pins or studs 24 and26. Each of the studs 24 and 26 is provided withan upwardly extendingprojection 28 and 30 which seats in an aperture in the plate 32.

A shaft 34 extends transversely through the upper portion of the covermember 20, and secured to this shaft by means of a pin 36 is a camroller 38, This cam roller rests upon the plate 32 intermediate theportions wherein the studs 24 and 26 are seated.

The switch plates 40 and 42 are held against the studs 24and 26respectively by means of coil springs 44 and 46. As illustrated thesesprings are held in fixed position withrelation to the switch blades 40and 42 by means of downwardly extending projections on studs 24 and 26.Spring 46 is stiffer than spring 44.

lit is obvious from the illustrations that as the shaft 34 is rotatedthe cam roller 38 is likewise rotated. This cairn roller contacts theupper face of plate 32 and as it rotates, it will function to depressthe switch plate 40 'iipon its initial rotation and bridge the contacts48. This particular switch may be incorporated with a resistance unitsuch as I have described in my above specified copending application.Upon subsequent rotation of the cam roller '38 the switch blade 42 willbe depressed, bridging contacts 50, and thus shunting out the resistanceunit to close a direct circuit from the battery through any desiredelectromotive apparatus such as the electric motor 52 in Fig. 4.

Various modifications of my device will be apparent to those skilled inthe art and for that reason I intend to limit myself only I claim: 1. Anelectric switch comprising a housing, a plurality of pairs ofcontactsand -1nde-.

pendently operable-means forbridging each 1 pair supported therein,rigid-means coupled pendently therewith and operable to actuate eitherone or both of said bridging means, and a rotatable member operable fromoutside the housing contacting said rigid means and adapted uponrotation to successively bridge said pairs of contacts.

2. An electric switch comprising a housing, a plurality of p)airs ofcontacts and; independently opera le means for bridging each pairsupported therein, rigid means coupled therewith and operable toactuateeither one or both of said bridging means, a cam shaft rotatablyjournalled in said housing having its cam face contacting said rigidmeans and operable from a point outside the housing.

3. An electric switch comprising a housing, a plurality of pairs ofcontacts and indeoperable means for bridging each pair supportedtherein, and yieldable means of unequal power associated with eachbridging means normally retaining the same in non-bridging position. p

4. An electric switch comprising a housing, a plurality of airs ofcontacts and independently opera ble means for bridging each pairsupported therein, yieldable means associated with each bridging meansnormally renecte blades for actuatin the-same successively. 9. Anelectric switch comprising a hous ing, a plurality of pairs of contactsinde-' pendently operable switch blades helg in inoperative positionwith'relation to sm 1y coupled with each of said'switch yieldably VCpairs of contacts, a rigid unit disconblades, and rotatable meanseccentrically journalled within. said housing about an axis midwaybetween said switch blades and in camming relation to said rigid unit.

10. In combination with a pair of contacts,

independently operable switch blades yieldably retaine in inoperativerelation to each of said contacts, a single unit coupled with each-ofsaidswitch blades at spaced apart points, axis of and bearing upon saidsingle unit in camming relation thereto. v a

In testimony whereof, I, VINCENT GaAPILE, sign this specification. 5VINCENT G. APPLE.

and an eccentric journalled about an taining the-same in non-bridgingposition,

and a single rotatable means operable from a point outside the housingfor overcoming the resistance of said yieldingmeans to bridge thecontacts.

5. An electric switch comprising a housing, a plurality of pairs ofcontacts and independently operable means for bridging each pairsupported therein, yieldable means of varying resistance, a singlemember coupled with all of said bridging means,

and rotatable means journalld in the housing engaging said single memberwhereby said pairs of contacts are successively bridged upon rotationthereof.

v6. An electric switch comprising a housing, two pairs of'contactssecured therein,

studs slidably supported therein carrying a bridge plate in operativerelation to each pair of contacts, and separate yieldable means ofunequal power retaining each stud at the inoperative extremity of itsslidable movement.

7 An electric switch comprising a housing, a plurality of pairs ofcontacts supported therein, a switch blade operable to ridge :each ofsaid pairs. of contacts, and yieldable means of unequal power retainingeach of said blades in non-circuit making position.

8. An electric switch comprising a housing, a plurality of pairs ofcontacts supported therein, a switch blade operable to bridge each ofsaid pairs of contacts, and yieldable means of unequal power retainingeach of said blades in non-circuit making position, and .rotatable meansoperable through a rotation midway between said blades A single rigidconnection between said switch

